A polymeric solution consist of base polymer + solvent+ additives. During phase inversion process in the coagulation bath additives leach out. Is it necessary to leach out all of them from the membrane film? How we can characterize it ?
I think the answer is yes, for many reasons with the simplest one being to avoid the contamination ones the membrane us reused. Spectroscopic techniques are used to check the existance of residual additives. Regards